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On the Mechanism of Cavitation Damage by Non-Hemispherical Cavities Collapsing in Contact with a Solid Boundary

Naudé, Charl F. and Ellis, Albert T. (1960) On the Mechanism of Cavitation Damage by Non-Hemispherical Cavities Collapsing in Contact with a Solid Boundary. California Institute of Technology , Pasadena, CA. (Unpublished) http://resolver.caltech.edu/CaltechAUTHORS:20150526-144122096

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Abstract

A perfect fluid theory, which neglects the effect of gravity, and which assumes that the pressure inside a cavitation bubble remains constant during the collapse process, is given for the case of a nonhemispherical, but axially symmetric cavity which collapses in contact with a solid boundary. The theory suggests the possibility that such a cavity may deform to the extent that its wall strikes the solid boundary before minimum cavity volume is reached. High speed motion pictures of cavities generated by spark methods are used to test the theory experimentally. Agreement between theory and experiment is good for the range of experimental cavities considered, and the phenomenon of the cavity wall striking the solid boundary does indeed occur. Studies of damage by cavities of this type on soft aluminum samples reveals that pressures caused by the cavity wall striking the boundary are higher than those resulting from a compression of gases inside the cavity, and are responsible for the damage.


Item Type:Report or Paper (Technical Report)
Additional Information:Department of the Navy Naval Ordnance Test Station Contract N123(60530)24917A. Report No. E-108.7. Financial support from the following sources made this study possible. 1. Research Bursary from the South Africa Council for Scientific and Industrial Research ( 1956 -1959) 2. Queen Victoria Stipendium from the University of Stellenbosch, South Africa (1957-1959) 3. Francis J. Cole fellowship from the California Institute of Technology The experimental work was carried on with support from 1. National Science Foundation Grant G -25 86. 2. U.S. Navy Bureau of Ordnance contract NOrd 16200. 3. Office of Naval Research equipment loan NOnr 218100. 4. U.S. Naval Ordnance Test Station Contract N123(60530)21703A. 5. U.S. Naval Ordnance Test Station Contract N123(60530}24917A.
Group:Hydrodynamics Laboratory
Funders:
Funding AgencyGrant Number
U. S. Naval Ordnance Test StationN123(60530)24917A
South Africa Council for Scientific and Industrial ResearchUNSPECIFIED
University of Stellenbosch, South AfricaUNSPECIFIED
NSFG -2586
U.S. Navy Bureau of OrdnanceNOrd 16200
Office of Naval Research (ONR)NOnr 218100
U. S. Naval Ordnance Test StationN123(60530)21703A
CaltechUNSPECIFIED
Record Number:CaltechAUTHORS:20150526-144122096
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150526-144122096
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57826
Collection:CaltechAUTHORS
Deposited By: Kristin Buxton
Deposited On:27 May 2015 18:34
Last Modified:27 May 2015 18:34

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